“The belief is that she kissed somebody at the concert and that’s what upset him,” according to Utica’s WKTV.

It’s unclear which concert the couple attended, but afterward they drove back up to Utica, where Clark allegedly snapped, slitting Devins’ throat and posting a grisly photo of her to Instagram, police have said.

“I have a very hard time understanding how anybody can justify taking another young person’s life because they kissed somebody else,” added McNamara.